Seismicity map of the state of Louisiana

Miscellaneous Field Studies Map 1081

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Abstract

This map is one of a series of seismicity maps produced by the U.S. Geological Survey that show earthquake data of individual states or groups of states at the scale of 1:1,000,000. This map shows only those earthquakes with epicenters located within the boundaries of Louisiana, even though earthquakes in nearby states may have been felt or may have caused damage in Louisiana.

The data in table 1 were used to compile the seismicity map; these data are a corrected, expanded, and updated (through 1987) version of the data used by Algermissen (1969) for a study of seismic risk in the United States. The locations and intensities of some earthquakes were revised and intensities were assigned where none had been before. Many earthquakes were added to the original list from new data sources as well as from some old data sources that has not been previously used. The data in table 1 represent best estimates of the location of the epicenter, magnitude, and intensity of each earthquake on the basis of historical and current information. Some of the aftershocks from large earthquakes are listed, but not all, especially for earthquakes that occurred before seismic instruments were universally used.

Study Area

Additional publication details

Publication type:

Report

Publication Subtype:

USGS Numbered Series

Title:

Seismicity map of the state of Louisiana

Series title:

Miscellaneous Field Studies Map

Series number:

1081

Edition:

Revision - 1987

Year Published:

1987

Language:

English

Publisher:

U.S. Geological Survey

Description:

35.89 x 23.38 inches

Country:

United States

State:

Louisiana

Scale:

1000000

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